Sent in by Code Hunter
When at the play selection screen, with the Control Stick, push Up two
times (the cursor must be on the upper left corner). After this the
markers shouldn't been seen and you can pick your play in secret.

Sent in by Code Hunter at The Unofficial World of Nintendo!!!
In 1-2-3 the 1 would be controlled by the Z button. The 2 would be
controlled by the B button. The 3 controlled by the A button.
At Tonight's match-up screen enter:
5-1-4 Up Infinite turbo
0-3-2 Left Fast turbo running
3-1-2 Up Power-up offense
4-2-1 Up Power-up defense
2-3-3 Up Power-up teammates
3-1-2 Left Power-up blockers
0-4-5 Up Super blitzing
1-2-3 Left Super field goals
3-4-4 Up No interceptions
4-2-3 Down No random fumbles
2-1-0 Up No first downs
1-5-1 Up No punting
2-1-1 Left Allow stepping out of bounds
2-5-0 Left Fast passes
5-0-0 Left Turn off stadium
0-1-0 Up Late hits
0-0-1 Down Show field goal %
0-0-1 Right Show punt hang meter
1-0-0 Up Use team plays
1-0-2 Right Hide receiver name
3-3-3 Left Invisible receiver highlight
4-3-3 Up Invisible
0-5-0 Right Big football
2-0-0 Right Big head
0-4-0 Up Huge head
3-2-1 Left No head
1-2-3 Right Headless team
3-1-0 Right Team tiny players
1-4-1 Right Team big players
2-0-3 Right Team big heads
1-1-5 Left No play selection
0-2-1 Right Show more field
0-1-2 Down No CPU assistance
4-0-4 Left Power-up speed
5-5-5 Up Hyper blitz
3-1-4 Down Smart CPU opponent
1-1-1 Down Tournament mode
2-2-2 Left Always quarterback
2-2-2 Right Always receiver
5-0-1 Up Old day stadium
5-0-1 Down Day stadium
5-0-1 Left City stadium
5-0-2 Up Old night stadium
5-0-2 Down Night stadium
5-0-3 Up Old snow stadium
5-0-3 Down Snow stadium
5-0-3 Left Roman stadium
3-0-0 Up Grass field
3-0-1 Up Asphalt field
3-0-2 Up Dirt field
3-0-3 Up Astroturf field
3-0-4 Up Snow field
0-3-0 Down Fog on
0-4-1 Down Thick fog on
2-1-1 Left Weather: clear
5-2-5 Down Weather: snow
5-5-5 Right Weather: rain
0-2-2 Right Night game

Sent in by Scotty D at The Unofficial World of Nintendo!!!
At the "Enter Name for Record Keeping" screen, enter the following names
and pin numbers:
Name PIN Player
BRAIN 1111 Brain
FORDEN 1111 Dan Forden
SKULL 1111 Skull
TURMEL 0322 Mark Turmell
RAIDEN 3691 Raiden
SHINOK 8337 Shinnok